Mosquitoes breed in water, and the yard of a US home often holds more of it than the owner expects. The US Environmental Protection Agency (EPA) publishes guidance on how households and communities should control mosquitoes, built around integrated pest management (IPM). This article summarises three EPA pages: “Success in Mosquito Control: An Integrated Approach” (last updated 8 October 2025), “Controlling Mosquitoes at the Larval Stage” (last updated 26 February 2026) and “Bti for Mosquito Control” (last updated 2 June 2026). It covers the United States only, since registered products and rules differ elsewhere, and it is general information. The UK equivalent, which is about reporting and standing water, is covered in the site’s piece on mosquito control and standing water.
The four-part approach EPA describes
EPA says effective mosquito management means intervening at some point in the mosquito life cycle, and that the best approach uses every life stage through IPM, which it describes as a science-based approach focused on prevention, reduction and eliminating the conditions that lead to infestations. It also says IPM relies heavily on resident education and monitoring, and that a successful strategy can include pesticides. It names four tactics: remove mosquito habitats, use structural barriers, control mosquitoes at the larval stage and control adult mosquitoes.
Tactic one: remove habitats around the home
Because mosquitoes need water for two stages of their life cycle, EPA says an important part of control around homes is giving them nowhere to lay eggs. Its list is practical:
- Get rid of standing water in rain gutters, old tires, buckets, plastic covers, toys and any other container.
- Empty and change the water in bird baths, fountains, wading pools, rain barrels and potted-plant trays at least once a week.
- Drain temporary pools or fill them with dirt, and keep swimming pool water treated and circulating.
EPA notes that Aedes aegypti mosquitoes lay eggs in containers with wide openings holding water with organic material such as decaying leaves, prefer dark containers in the shade, and can use sites as small as bottle caps. It adds that egg and larva interventions are generally the most effective and least costly way to control mosquitoes, but that they are unlikely to be 100 per cent effective, especially for species that breed in varied and scattered locations, so habitat removal needs supplementing.
Tactic two: structural barriers
Because Aedes mosquitoes frequently bite indoors, EPA says barriers reduce bites. It lists installing window and door screens where they are missing, making sure screens are “bug tight”, and covering gaps in walls, doors and windows. Its Puerto Rico example also mentions netting over baby carriers and beds.
Tactic three: larvicides
EPA says larvicides target larvae in breeding habitat before they mature and disperse, which it describes as maximising the effect of pesticide use while minimising widespread application. It says choosing which larvicide to use in a given area is best done by experts, depending on factors such as risk, cost, resistance and ease of use. The main groups it describes are bacterial insecticides (Bacillus species), insect growth inhibitors such as methoprene, oils and films that form a thin layer on the water surface, and the organophosphate temephos. It says temephos is labelled only for use by public health officials or mosquito abatement personnel, and that EPA issued a cancellation order for all its uses in February 2011, with the manufacturer barred from selling temephos products after 31 December 2015.
Bti: the larvicide sold to homeowners
EPA describes Bti (Bacillus thuringiensis subspecies israelensis) as a naturally occurring soil bacterium whose toxins specifically affect the larvae of mosquitoes, blackflies and fungus gnats. It says EPA has registered five strains in 48 pesticide products for residential, commercial and agricultural use, primarily against mosquito larvae. EPA says Bti can be used around homes in containers and places where water collects, such as flower pots, tires and bird baths, and on larger waters such as ponds and irrigation ditches. It says a number of Bti products are sold as “homeowner” products, that no special precautions are needed for applying them, and that people do not need to leave treated areas. Its published conclusion is that Bti does not pose a risk to humans and has minimal toxicity to honey bees, and that there is no documented resistance to Bti as a larvicide. EPA also stresses following the label for any Bti product: some are allowed for certain drinking water such as cisterns while others are not. These are EPA’s conclusions about the product class; the label of the specific product governs use.
Tactic four: adult mosquitoes
EPA says chemical control of adult mosquitoes is legitimate in certain circumstances, especially when disease is being transmitted or when habitat removal and larval control have failed or are not feasible. Adulticides are applied by aircraft or truck-mounted sprayers as ultra-low-volume sprays. EPA says choosing an adulticide is a job best done by experts, and that decisions on where and when to spray are made by local officials, who announce dates and locations in their communities. This is a public programme, not a household treatment.
Common questions
Does EPA say larvicides are safe for a garden pond?
EPA says Bti can be used on larger bodies of water such as ponds and irrigation ditches and that products differ, so the label decides which uses are allowed.
Is screening enough?
EPA lists screens as one of four tactics and says a successful strategy combines several.
The bottom line
EPA’s guidance treats mosquito control as a sequence: remove standing water, screen the home, treat breeding water with a registered larvicide where needed and leave adult spraying to local programmes. Bti products sold for homes are the larvicide EPA describes most fully, and EPA says the label of any product controls where it can be used. Homeowners weighing DIY against a contractor should ask what the contractor will do at each stage.
Sources
- US EPA, “Success in Mosquito Control: An Integrated Approach” (epa.gov)
- US EPA, “Controlling Mosquitoes at the Larval Stage” (epa.gov)
- US EPA, “Bti for Mosquito Control” (epa.gov)